Jennifer Jo Cobb said she was “mad as hell” at Tyler Reddick and forgot a NASCAR rule that prohibits drivers from walking on the track, which she did during Friday’s NASCAR Camping World Truck Series race at Dover International Speedway.

“The fact that I forget is such a shame because the reason (the rule) is in place likely stems from a tragedy that none of us should forget,’’ Cobb said after meeting with NASCAR officials.

NASCAR instituted the rule last August after Tony Stewart struck and killed Kevin Ward Jr. in a sprint car race in New York. Ward walked down the track toward Stewart’s car after an incident and was struck.

This the first time a driver in any of NASCAR’s three national series has violated the rule.

“A huge error in judgment on my part,’’ Cobb said. “The fact that we had a very stern meeting will keep it top of my mind for sure.’’

Elton Sawyer, director of the Camping World Truck Series, said of Cobb’s actions: “It’s a serious infraction. She understands what she did and there will be consequences.’’